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https://issues.apache.org/jira/browse/CHUKWA-98?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12697099#action_12697099
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Eric Yang commented on CHUKWA-98:
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You should have a shutdown function added to the shutdown hook, but only for
SIGHUP and SIGTERM should have pFile.clean(); called.
> PidFile issue
> -------------
>
> Key: CHUKWA-98
> URL: https://issues.apache.org/jira/browse/CHUKWA-98
> Project: Hadoop Chukwa
> Issue Type: Bug
> Reporter: Jerome Boulon
> Priority: Blocker
>
> Some processes like Collectors, demuxManager, etc have to be able to exit if
> they have to.
> In that case, watchdog will not restart them since the shutdown hook will
> have done the cleanup.
> pFile = new PidFile("Agent");
> Runtime.getRuntime().addShutdownHook(pFile);
> pFile = new PidFile("Collector");
> Runtime.getRuntime().addShutdownHook(pFile);
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